mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 13:36:48 +07:00
61616115d7
In the near future, the driver core is going to not allow direct access to the driver_data pointer in struct device. Instead, the functions dev_get_drvdata() and dev_set_drvdata() should be used. These functions have been around since the beginning, so are backwards compatible with all older kernel versions. Cc: linux-kernel@vger.kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
432 lines
11 KiB
C
432 lines
11 KiB
C
/*
|
|
* Low-level parallel-support for PC-style hardware integrated in the
|
|
* LASI-Controller (on GSC-Bus) for HP-PARISC Workstations
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* (C) 1999-2001 by Helge Deller <deller@gmx.de>
|
|
*
|
|
*
|
|
* based on parport_pc.c by
|
|
* Grant Guenther <grant@torque.net>
|
|
* Phil Blundell <philb@gnu.org>
|
|
* Tim Waugh <tim@cyberelk.demon.co.uk>
|
|
* Jose Renau <renau@acm.org>
|
|
* David Campbell
|
|
* Andrea Arcangeli
|
|
*/
|
|
|
|
#undef DEBUG /* undef for production */
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/init.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/sysctl.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/dma.h>
|
|
#include <asm/uaccess.h>
|
|
#include <asm/superio.h>
|
|
|
|
#include <linux/parport.h>
|
|
#include <asm/pdc.h>
|
|
#include <asm/parisc-device.h>
|
|
#include <asm/hardware.h>
|
|
#include "parport_gsc.h"
|
|
|
|
|
|
MODULE_AUTHOR("Helge Deller <deller@gmx.de>");
|
|
MODULE_DESCRIPTION("HP-PARISC PC-style parallel port driver");
|
|
MODULE_SUPPORTED_DEVICE("integrated PC-style parallel port");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|
|
/*
|
|
* Clear TIMEOUT BIT in EPP MODE
|
|
*
|
|
* This is also used in SPP detection.
|
|
*/
|
|
static int clear_epp_timeout(struct parport *pb)
|
|
{
|
|
unsigned char r;
|
|
|
|
if (!(parport_gsc_read_status(pb) & 0x01))
|
|
return 1;
|
|
|
|
/* To clear timeout some chips require double read */
|
|
parport_gsc_read_status(pb);
|
|
r = parport_gsc_read_status(pb);
|
|
parport_writeb (r | 0x01, STATUS (pb)); /* Some reset by writing 1 */
|
|
parport_writeb (r & 0xfe, STATUS (pb)); /* Others by writing 0 */
|
|
r = parport_gsc_read_status(pb);
|
|
|
|
return !(r & 0x01);
|
|
}
|
|
|
|
/*
|
|
* Access functions.
|
|
*
|
|
* Most of these aren't static because they may be used by the
|
|
* parport_xxx_yyy macros. extern __inline__ versions of several
|
|
* of these are in parport_gsc.h.
|
|
*/
|
|
|
|
void parport_gsc_init_state(struct pardevice *dev, struct parport_state *s)
|
|
{
|
|
s->u.pc.ctr = 0xc | (dev->irq_func ? 0x10 : 0x0);
|
|
}
|
|
|
|
void parport_gsc_save_state(struct parport *p, struct parport_state *s)
|
|
{
|
|
s->u.pc.ctr = parport_readb (CONTROL (p));
|
|
}
|
|
|
|
void parport_gsc_restore_state(struct parport *p, struct parport_state *s)
|
|
{
|
|
parport_writeb (s->u.pc.ctr, CONTROL (p));
|
|
}
|
|
|
|
struct parport_operations parport_gsc_ops =
|
|
{
|
|
.write_data = parport_gsc_write_data,
|
|
.read_data = parport_gsc_read_data,
|
|
|
|
.write_control = parport_gsc_write_control,
|
|
.read_control = parport_gsc_read_control,
|
|
.frob_control = parport_gsc_frob_control,
|
|
|
|
.read_status = parport_gsc_read_status,
|
|
|
|
.enable_irq = parport_gsc_enable_irq,
|
|
.disable_irq = parport_gsc_disable_irq,
|
|
|
|
.data_forward = parport_gsc_data_forward,
|
|
.data_reverse = parport_gsc_data_reverse,
|
|
|
|
.init_state = parport_gsc_init_state,
|
|
.save_state = parport_gsc_save_state,
|
|
.restore_state = parport_gsc_restore_state,
|
|
|
|
.epp_write_data = parport_ieee1284_epp_write_data,
|
|
.epp_read_data = parport_ieee1284_epp_read_data,
|
|
.epp_write_addr = parport_ieee1284_epp_write_addr,
|
|
.epp_read_addr = parport_ieee1284_epp_read_addr,
|
|
|
|
.ecp_write_data = parport_ieee1284_ecp_write_data,
|
|
.ecp_read_data = parport_ieee1284_ecp_read_data,
|
|
.ecp_write_addr = parport_ieee1284_ecp_write_addr,
|
|
|
|
.compat_write_data = parport_ieee1284_write_compat,
|
|
.nibble_read_data = parport_ieee1284_read_nibble,
|
|
.byte_read_data = parport_ieee1284_read_byte,
|
|
|
|
.owner = THIS_MODULE,
|
|
};
|
|
|
|
/* --- Mode detection ------------------------------------- */
|
|
|
|
/*
|
|
* Checks for port existence, all ports support SPP MODE
|
|
*/
|
|
static int __devinit parport_SPP_supported(struct parport *pb)
|
|
{
|
|
unsigned char r, w;
|
|
|
|
/*
|
|
* first clear an eventually pending EPP timeout
|
|
* I (sailer@ife.ee.ethz.ch) have an SMSC chipset
|
|
* that does not even respond to SPP cycles if an EPP
|
|
* timeout is pending
|
|
*/
|
|
clear_epp_timeout(pb);
|
|
|
|
/* Do a simple read-write test to make sure the port exists. */
|
|
w = 0xc;
|
|
parport_writeb (w, CONTROL (pb));
|
|
|
|
/* Is there a control register that we can read from? Some
|
|
* ports don't allow reads, so read_control just returns a
|
|
* software copy. Some ports _do_ allow reads, so bypass the
|
|
* software copy here. In addition, some bits aren't
|
|
* writable. */
|
|
r = parport_readb (CONTROL (pb));
|
|
if ((r & 0xf) == w) {
|
|
w = 0xe;
|
|
parport_writeb (w, CONTROL (pb));
|
|
r = parport_readb (CONTROL (pb));
|
|
parport_writeb (0xc, CONTROL (pb));
|
|
if ((r & 0xf) == w)
|
|
return PARPORT_MODE_PCSPP;
|
|
}
|
|
|
|
/* Try the data register. The data lines aren't tri-stated at
|
|
* this stage, so we expect back what we wrote. */
|
|
w = 0xaa;
|
|
parport_gsc_write_data (pb, w);
|
|
r = parport_gsc_read_data (pb);
|
|
if (r == w) {
|
|
w = 0x55;
|
|
parport_gsc_write_data (pb, w);
|
|
r = parport_gsc_read_data (pb);
|
|
if (r == w)
|
|
return PARPORT_MODE_PCSPP;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Detect PS/2 support.
|
|
*
|
|
* Bit 5 (0x20) sets the PS/2 data direction; setting this high
|
|
* allows us to read data from the data lines. In theory we would get back
|
|
* 0xff but any peripheral attached to the port may drag some or all of the
|
|
* lines down to zero. So if we get back anything that isn't the contents
|
|
* of the data register we deem PS/2 support to be present.
|
|
*
|
|
* Some SPP ports have "half PS/2" ability - you can't turn off the line
|
|
* drivers, but an external peripheral with sufficiently beefy drivers of
|
|
* its own can overpower them and assert its own levels onto the bus, from
|
|
* where they can then be read back as normal. Ports with this property
|
|
* and the right type of device attached are likely to fail the SPP test,
|
|
* (as they will appear to have stuck bits) and so the fact that they might
|
|
* be misdetected here is rather academic.
|
|
*/
|
|
|
|
static int __devinit parport_PS2_supported(struct parport *pb)
|
|
{
|
|
int ok = 0;
|
|
|
|
clear_epp_timeout(pb);
|
|
|
|
/* try to tri-state the buffer */
|
|
parport_gsc_data_reverse (pb);
|
|
|
|
parport_gsc_write_data(pb, 0x55);
|
|
if (parport_gsc_read_data(pb) != 0x55) ok++;
|
|
|
|
parport_gsc_write_data(pb, 0xaa);
|
|
if (parport_gsc_read_data(pb) != 0xaa) ok++;
|
|
|
|
/* cancel input mode */
|
|
parport_gsc_data_forward (pb);
|
|
|
|
if (ok) {
|
|
pb->modes |= PARPORT_MODE_TRISTATE;
|
|
} else {
|
|
struct parport_gsc_private *priv = pb->private_data;
|
|
priv->ctr_writable &= ~0x20;
|
|
}
|
|
|
|
return ok;
|
|
}
|
|
|
|
|
|
/* --- Initialisation code -------------------------------- */
|
|
|
|
struct parport *__devinit parport_gsc_probe_port (unsigned long base,
|
|
unsigned long base_hi,
|
|
int irq, int dma,
|
|
struct pci_dev *dev)
|
|
{
|
|
struct parport_gsc_private *priv;
|
|
struct parport_operations *ops;
|
|
struct parport tmp;
|
|
struct parport *p = &tmp;
|
|
|
|
priv = kzalloc (sizeof (struct parport_gsc_private), GFP_KERNEL);
|
|
if (!priv) {
|
|
printk (KERN_DEBUG "parport (0x%lx): no memory!\n", base);
|
|
return NULL;
|
|
}
|
|
ops = kmalloc (sizeof (struct parport_operations), GFP_KERNEL);
|
|
if (!ops) {
|
|
printk (KERN_DEBUG "parport (0x%lx): no memory for ops!\n",
|
|
base);
|
|
kfree (priv);
|
|
return NULL;
|
|
}
|
|
memcpy (ops, &parport_gsc_ops, sizeof (struct parport_operations));
|
|
priv->ctr = 0xc;
|
|
priv->ctr_writable = 0xff;
|
|
priv->dma_buf = 0;
|
|
priv->dma_handle = 0;
|
|
priv->dev = dev;
|
|
p->base = base;
|
|
p->base_hi = base_hi;
|
|
p->irq = irq;
|
|
p->dma = dma;
|
|
p->modes = PARPORT_MODE_PCSPP | PARPORT_MODE_SAFEININT;
|
|
p->ops = ops;
|
|
p->private_data = priv;
|
|
p->physport = p;
|
|
if (!parport_SPP_supported (p)) {
|
|
/* No port. */
|
|
kfree (priv);
|
|
return NULL;
|
|
}
|
|
parport_PS2_supported (p);
|
|
|
|
if (!(p = parport_register_port(base, PARPORT_IRQ_NONE,
|
|
PARPORT_DMA_NONE, ops))) {
|
|
kfree (priv);
|
|
kfree (ops);
|
|
return NULL;
|
|
}
|
|
|
|
p->base_hi = base_hi;
|
|
p->modes = tmp.modes;
|
|
p->size = (p->modes & PARPORT_MODE_EPP)?8:3;
|
|
p->private_data = priv;
|
|
|
|
printk(KERN_INFO "%s: PC-style at 0x%lx", p->name, p->base);
|
|
p->irq = irq;
|
|
if (p->irq == PARPORT_IRQ_AUTO) {
|
|
p->irq = PARPORT_IRQ_NONE;
|
|
}
|
|
if (p->irq != PARPORT_IRQ_NONE) {
|
|
printk(", irq %d", p->irq);
|
|
|
|
if (p->dma == PARPORT_DMA_AUTO) {
|
|
p->dma = PARPORT_DMA_NONE;
|
|
}
|
|
}
|
|
if (p->dma == PARPORT_DMA_AUTO) /* To use DMA, giving the irq
|
|
is mandatory (see above) */
|
|
p->dma = PARPORT_DMA_NONE;
|
|
|
|
printk(" [");
|
|
#define printmode(x) {if(p->modes&PARPORT_MODE_##x){printk("%s%s",f?",":"",#x);f++;}}
|
|
{
|
|
int f = 0;
|
|
printmode(PCSPP);
|
|
printmode(TRISTATE);
|
|
printmode(COMPAT)
|
|
printmode(EPP);
|
|
// printmode(ECP);
|
|
// printmode(DMA);
|
|
}
|
|
#undef printmode
|
|
printk("]\n");
|
|
|
|
if (p->irq != PARPORT_IRQ_NONE) {
|
|
if (request_irq (p->irq, parport_irq_handler,
|
|
0, p->name, p)) {
|
|
printk (KERN_WARNING "%s: irq %d in use, "
|
|
"resorting to polled operation\n",
|
|
p->name, p->irq);
|
|
p->irq = PARPORT_IRQ_NONE;
|
|
p->dma = PARPORT_DMA_NONE;
|
|
}
|
|
}
|
|
|
|
/* Done probing. Now put the port into a sensible start-up state. */
|
|
|
|
parport_gsc_write_data(p, 0);
|
|
parport_gsc_data_forward (p);
|
|
|
|
/* Now that we've told the sharing engine about the port, and
|
|
found out its characteristics, let the high-level drivers
|
|
know about it. */
|
|
parport_announce_port (p);
|
|
|
|
return p;
|
|
}
|
|
|
|
|
|
#define PARPORT_GSC_OFFSET 0x800
|
|
|
|
static int __devinitdata parport_count;
|
|
|
|
static int __devinit parport_init_chip(struct parisc_device *dev)
|
|
{
|
|
struct parport *p;
|
|
unsigned long port;
|
|
|
|
if (!dev->irq) {
|
|
printk(KERN_WARNING "IRQ not found for parallel device at 0x%llx\n",
|
|
(unsigned long long)dev->hpa.start);
|
|
return -ENODEV;
|
|
}
|
|
|
|
port = dev->hpa.start + PARPORT_GSC_OFFSET;
|
|
|
|
/* some older machines with ASP-chip don't support
|
|
* the enhanced parport modes.
|
|
*/
|
|
if (boot_cpu_data.cpu_type > pcxt && !pdc_add_valid(port+4)) {
|
|
|
|
/* Initialize bidirectional-mode (0x10) & data-tranfer-mode #1 (0x20) */
|
|
printk("%s: initialize bidirectional-mode.\n", __func__);
|
|
parport_writeb ( (0x10 + 0x20), port + 4);
|
|
|
|
} else {
|
|
printk("%s: enhanced parport-modes not supported.\n", __func__);
|
|
}
|
|
|
|
p = parport_gsc_probe_port(port, 0, dev->irq,
|
|
/* PARPORT_IRQ_NONE */ PARPORT_DMA_NONE, NULL);
|
|
if (p)
|
|
parport_count++;
|
|
dev_set_drvdata(&dev->dev, p);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit parport_remove_chip(struct parisc_device *dev)
|
|
{
|
|
struct parport *p = dev_get_drvdata(&dev->dev);
|
|
if (p) {
|
|
struct parport_gsc_private *priv = p->private_data;
|
|
struct parport_operations *ops = p->ops;
|
|
parport_remove_port(p);
|
|
if (p->dma != PARPORT_DMA_NONE)
|
|
free_dma(p->dma);
|
|
if (p->irq != PARPORT_IRQ_NONE)
|
|
free_irq(p->irq, p);
|
|
if (priv->dma_buf)
|
|
pci_free_consistent(priv->dev, PAGE_SIZE,
|
|
priv->dma_buf,
|
|
priv->dma_handle);
|
|
kfree (p->private_data);
|
|
parport_put_port(p);
|
|
kfree (ops); /* hope no-one cached it */
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static struct parisc_device_id parport_tbl[] = {
|
|
{ HPHW_FIO, HVERSION_REV_ANY_ID, HVERSION_ANY_ID, 0x74 },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(parisc, parport_tbl);
|
|
|
|
static struct parisc_driver parport_driver = {
|
|
.name = "Parallel",
|
|
.id_table = parport_tbl,
|
|
.probe = parport_init_chip,
|
|
.remove = __devexit_p(parport_remove_chip),
|
|
};
|
|
|
|
int __devinit parport_gsc_init(void)
|
|
{
|
|
return register_parisc_driver(&parport_driver);
|
|
}
|
|
|
|
static void __devexit parport_gsc_exit(void)
|
|
{
|
|
unregister_parisc_driver(&parport_driver);
|
|
}
|
|
|
|
module_init(parport_gsc_init);
|
|
module_exit(parport_gsc_exit);
|